/Engine/Source/Editor/SceneOutliner/Public/SSceneOutliner.h
Scene Outliner widget
class SSceneOutliner : public [ISceneOutliner](API\Editor\SceneOutliner\ISceneOutliner), public [FEditorUndoClient](API\Editor\UnrealEd\FEditorUndoClient), public [FGCObject](API\Runtime\CoreUObject\UObject\FGCObject)